Animated Bubbles. "Remake" of Kevin Levron's Bubbles (CodePen Circles Challenge). Really "fireballs" are only changed by "bubbles". More accurate (thin) Bubbles 2 flicker due to aliasing.
Tested on Oculus Go (with touchpad) and VR BOX2 (with joystick). For tests on a desktop (Windows 10 + Chrome) the "inline" webxr session and A,S,D,W,↑,↓ keys for navigation are used.
WebXR samples     updated 21 Apr 2020